Colleen Mallon Dizeo, 48, was fatally wounded at about 5:30 p.m., when a 2003 Dodge Ram struck her at the intersection of Richmond Road and Lincoln Avenue.

She died at Staten Island University Hospital, Ocean Breeze, later that night. A previous report from police stating that she was still in critical condition on Saturday was inaccurate.

A law enforcement source close to the investigation said her death appears to be accidental -- the truck’s driver was making a turn at the intersection and didn’t see her.

Ms. Dizeo, a single mother of a young daughter, was on her way home from work and was crossing the street to get from one bus stop to a second bus that would take her home, said her sister, Noreen Vaquer.

A longtime employee of Webster Watch, Ms. Dizeo had taken a new job at a company on Capodanno Boulevard, Ms. Vaquer said.

"She had fractured her ankle in July, and she still worked," Ms. Vaquer said, noting that the injury came after she tripped on toys and fell down a set of stairs. "She had cervical cancer three times, and for her to die of this, it just kills me... She’s just the greatest person, she would do anything for you."

Ms. Vaquer said her sister was always careful crossing the street, particularly because of her recent ankle injury.